protactinium Hear it!

protactinium Definition

pro·tac·tin·ium (prō′tak tin′ē əm)

noun

a rare, radioactive, metallic chemical element, one of the actinides, found in pitchblende: symbol, Pa; at. no., 91

Etymology: ModL: see proto- & actinium

Browse dictionary entries near protactinium

  1. ‹ prot-
  2. ‹ protégée
  3. ‹ protégé
  4. ‹ Prot
  5. ‹ prosy
  6. ‹ prostyle
  7. ‹ prostration
  8. ‹ prostrate
  9. ‹ prostomium
  10. ‹ prostitution
  1. protagonist ›
  2. Protagoras ›
  3. protamine ›
  4. protanopia ›
  5. protasis ›
  6. protea ›
  7. protean ›
  8. protease ›
  9. protease inhibitor ›
  10. protect ›